描述
- Maintenance-free CO2 sensing element (depending on type) based on optical infrared absorption measurement (NDIR1))
- Or with VOC2) sensing element based on a heated tin dioxide semiconductor
- CO2 temperature (active or passive) and CO2 humidity-temperature multisensor
- No recalibrations required
- Operating voltage AC 24 V or DC 15…35 V
- Signal outputs DC 0…10 V or DC 0…5 V or 4…20 mA adjustable
- Selectable passive temperature sensing element
In ventilation and air conditioning plants to enhance room comfort and optimize energy consumption by providing demand-controlled ventilation. The sensor acquires:
- CO2 concentrations as an indication of occupancy in rooms where smoking is prohibited.
- VOC concentrations as an indication of odors such as tobacco smoke, body odor, or material fumes in the room.
- Relative humidity in the room.
- Room temperature.
Sensors QPA10… and QPA20… can be used as a:
- Control sensor.
- Transmitter for building automation and control systems and / or display units (QPA20…D only).
